That's a good point, can you copy and paste exactly what's in your .txt file or link to it.

Is it different from the sample data you gave? Because that worked.

After about 45 min. of figuring out how to use codeblocks and compile and run everything... It all worked with the "dropout115.txt" file within the same folder as the "main.cpp" and './a.out' ran the code no problem. The issue sounds like it's with your .txt file. Try a smaller block of data, like the section you gave us.